Method for the production of alpha cold glaze upon building material, such as concrete, sandstone, clay, brickwork, and the like



Patented July 26, 1927.

UNITED STATES PATENT orncs.

KARL FRIEDRICH, OI BBESLAU, GERMANY.

METHOD FOR m IBODUCTION OR A COLD GLAZE UPON BUILDING MATERIAL, B'C'CE AB CONCRETE, SLNIDSTONB, CLAY, BBICKWOBK, AND 'rm LIKE.

30 Drawing.

3, 1922, a process for the production of cold glaze on building materials, such as concrete, sandstone, clay, brickwork and the like has become known consisting in mixing a finely,

It has now been found that not only the bituminous substances treatedin the manner set forth in Patent 1,402,412'are capable of making the glaze appear rapidly and in perfect condition by adding the glazing composition to a mass consisting of cement or similar material finely distributed in water but also other water repelling substances which, as addition tothe solid ingredients mentioned in said patent, serve for the purpose of making concrete and brickwork water-proof.

The improvement over the method described and claimed in the above mentioned prior patent is that a lar e. number of substances is available of whlch that substance can be selected which is actually the cheapest, and the invention consists in substituting for the aqueous bituminous substances free of volatile oils and oxidized in the presence of alkalies as defined in the prior Patent No. 1,402,412, anyof the following substances used for rendering concrete and brickwork water-proof and which may be divided into two grou s. The first group comprises substances w ich are impermeable to water and which communicate this character to the whole mass of concrete or brickworkby being finely distributed in the mortar or in the concrete. To this group belong essentially bituminous substances, waxlike or resinous substances and the like. The

' second group consists of substances which, in order to be transformed into compounds, not

Application filed October a, 1821. Io. C8385.

By Patent'No. 1,402 412 granted J anuary' soluble in water, have to be admixed either prior to their application or prior to the drying, with lime, magnesia or the like. These substances are most of a soaplike character. Such substances which have become known are, for instance, ammoniacal zinc solutions and soa s or alkaline or ammoniacal-solutions of t e'hydroxides or co per, lead, tin, chromium aluminium and e ike 1n CODJllIlCtiOD 'wlth soa or past masses which are obtained by ad ition of ca ci'u m suboleate with aluminium sulphate solutlons.

The effect of these substances is to cause the formation of water-proof metallic soaps which fix the laze that forms immediately upon application of the glazing composition, and prevent the dullin or disappearance of the glaze upon settm d in or solidifying. This is the samee ect w '0 1s produced y bitumen. I

Ewamplc.

Portland cement approximately equal to one third ofvthe quantit by weight of the diluted solution is ad ed to the diluted solution and stirred so that a thin paste is formed which by means of a squirting apparatus is used for coating the surface to be glazed. After the concrete has bound and golidified a bright absolutely continuous surace free of pores will appear on the object treated, this coating being similar to a glaze produced 0110011111110 artlcles when they are glazed under heat.

I- claim:--

A- method for producing in the cold state a permanent thin glaze-like coating on building material consisting in reparm a mixture of cement, water and an emu sion of zinc soap, and in painting the buildin material with a thin coatin of this liquid.

In testimony whereof aflix m signature.

KARL FR DBICH. 

